What is the Least Common Multiple of 20451 and 20469?

Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor.

Least Common Multiple of 20451 and 20469 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20451 and 20469, than apply into the LCM equation.

GCF(20451,20469) = 3
LCM(20451,20469) = ( 20451 × 20469) / 3
LCM(20451,20469) = 418611519 / 3
LCM(20451,20469) = 139537173

Least Common Multiple (LCM) of 20451 and 20469 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20451 and 20469. First we will calculate the prime factors of 20451 and 20469.

Prime Factorization of 20451

Prime Factorization of 20469

Now multiplying the highest exponent prime factors to calculate the LCM of 20451 and 20469.

LCM(20451,20469) = 3¹ × 17¹ × 401¹ × 6823¹
LCM(20451,20469) = 139537173